Atheris, try the The RPF. One of the best prop and modeler forums around, even Adam Savage from MythBusters is a member there and regularly posts and works with members on prop replica projects he's doing
I got my RC SD built up by an RPF member, and that second option is actually from an RPF member too :P Actually I believe the "prototype" that QMX originally was showing around was a Polar Lights buildup by a RPF member :P